CVE-2025-31651: Apache Tomcat Rewrite rule bypass

Quick answers

Is CVE-2025-31651 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2025-31651 being exploited in the wild.

How severe is CVE-2025-31651?

Medium severity, with a CVSS score of 4, published 28 April 2025.

Which products and versions are affected?

org.apache.tomcat:tomcat-catalina (Maven) ECOSYSTEM:introduced=9.0.76,fixed=9.0.104; org.apache.tomcat.embed:tomcat-embed-core (Maven) ECOSYSTEM:introduced=9.0.76,fixed=9.0.104.

Is there a fix for CVE-2025-31651?

Yes. org.apache.tomcat:tomcat-catalina (Maven): upgrade to 9.0.104 or later; org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 9.0.104 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2025-31651?

Check whether you run org.apache.tomcat:tomcat-catalina (Maven) or org.apache.tomcat.embed:tomcat-embed-core (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

• org.apache.tomcat:tomcat-catalina (Maven): upgrade to 9.0.104 or later

  # set org.apache.tomcat:tomcat-catalina to 9.0.104 in your pom.xml or build.gradle

• org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 9.0.104 or later

  # set org.apache.tomcat.embed:tomcat-embed-core to 9.0.104 in your pom.xml or build.gradle

Affected products

• org.apache.tomcat:tomcat-catalina (Maven) ECOSYSTEM:introduced=9.0.76,fixed=9.0.104
• org.apache.tomcat.embed:tomcat-embed-core (Maven) ECOSYSTEM:introduced=9.0.76,fixed=9.0.104

Identifiers

• CVE-2025-31651
• GHSA-ff77-26x5-69cr